Here’s a relatively new one–the Phil Spector-influenced “Underneath the Tree,” by Kelly Clarkson and Greg Kurstin, sung by Kelly Clarkson:
Video from KellyClarksonVEVO
[I]n December, 2013, Clarkson told Jay Leno that she waited to do a Christmas album until [Kurstin] was available.
She added, “He’s Jewish, so he didn’t know any of the songs. We were in the studio and I was like ‘Rudolph’? No. ‘White Christmas’? No. But he’s so talented.”
“I say: ‘Mr. Kurstin, aren’t you ashamed to not know the songs of your landsmen?'”